| 洪国斌,梁碧玲,沈君,黄文革.制备裸鼠皮下移植瘤动物模型: 3种建模方法及MR成像比较[J].中国医学影像技术,2010,26(2):205~208 |
| 制备裸鼠皮下移植瘤动物模型: 3种建模方法及MR成像比较 |
| Establishing subcutaneous tumor bearing nude mice model: Comparison of three different methods and MR imaging |
| 投稿时间：2009-07-20 修订日期：2009-10-21 |
| DOI： |
| 中文关键词: 肝肿瘤 模型,动物 磁共振成像 |
| 英文关键词:Liver neoplasms Models, animal Magnetic resonance imaging |
| 基金项目:国家自然科学基金(30900357)、广东省医学科研基金(B2009092)、中山大学医科青年教师科研启动基金(2008010)、广东省珠海市卫生局医学科研基金(2009055)。 |
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| 中文摘要: |
| 目的 通过比较3种人肝癌裸鼠皮下移植瘤模型建模方法,探索适于分子影像学研究的裸鼠移植瘤建模方法。方法 48只BALB/C-nu/nu裸小鼠随机分成3组,每组16只。对实验组采用2 mm3大小的瘤组织块建模,对照组1采用1 mm3大小的瘤组织块建模,对照组2采用瘤细胞悬液法进行建模,分别观察成瘤率、成瘤时间和成瘤数目。接种后3~6周进行常规MR扫描及T2-mapping成像。结果 实验组、对照组1、对照组2的成瘤率分别为93.75%、75.00%、43.75%,实验组与对照组2差异有统计学意义(P<0.05);实验组、对照组1、对照组2的肿瘤体积达1 cm3的时间分别为(21.7±2.4)天、(29.8±2.9)天、(34.6±3.9)天,组间两两比较差异均有统计学意义(P<0.05);3组形成单发肿瘤的比例分别为93.33%、75.00%、14.29%,实验组与对照组2差异有统计学意义(P<0.05)。常规T1WI和T2WI均能清晰显示肿瘤、肝脏、脾脏和脑组织等主要脏器,肿瘤在T1WI上呈等、稍低信号,在T2WI上呈高信号。利用多回波自旋回波序列(MSE)可测量肿瘤组织的T2弛豫时间,将T2-mapping成像数据输入工作站可获得T2-mapping伪彩图。结论 采用体积约2 mm3的改良瘤组织块法制作人肝癌移植瘤动物模型成瘤率高,成瘤时间短且较易形成单发肿瘤,可进行常规MR成像和T2-mapping成像,是一种适用于分子影像学成像研究的建模方法。 |
| 英文摘要: |
| Objective To compare the success rate, time of tumor formation and number of tumors in three methods of tumor transplantation, in order to seek an ideal animal model for molecular imaging study. Methods Forty-eight BALB/C-nu/nu nude mice were randomly divided into three groups (each n=16). Tumor tissue mass of 2 mm3 was injected into subcutaneous of nude mice in experiment group. Tumor tissue mass of 1 mm3 was applied in control group 1. Tumor cells suspension liquid was injected into subcutaneous of nude mice in control group 2. The tumor formation rate, the time of tumor formation and the number of tumors were observed. MRI scanning were performed 3—6 weeks after implantation. Results The rate of tumor formation of three groups was 93.75%, 75.00% and 43.75%, respectively. The time of tumor formation was (21.7±2.4), (29.8±2.9) and (34.6±3.9) days, respectively. The rate of solitary nodule implanted tumor was 93.33% in experiment group, higher than that in control group 1 (75.00%) and control group 2 (14.29%). The tumors were hypointense on T1WI and hyperintense on T2WI. Conclusion Transplantation 2 mm3 tumor tissue mass is effective to set up the subcutaneous implanted tumor models with a high success rate of tumor formation, a short time of tumor formation and high rate of solitary tumors, being suitable for the study of molecular imaging. The models can undertake conventional T1WI, T2WI and T2-mapping imaging, and the imaging qualities are good. |
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